The “Memorandums of the Imperial Academy of Sciences” publish scientific papers from various disciplines and contribute to academic research. Volume 52, containing the “Canon of Eclipses,” was a valuable resource for astronomy and astrophysics enthusiasts who want to study eclipses in the past and future and make predictions about such events. This publication comes from Theodor Ritter von Oppolzer and was published in 1887. The “Canon of Eclipses” was a comprehensive collection of over 13,000 solar and lunar eclipses, including all total solar and penumbral lunar eclipses between ?1208 B.C.E. and 2161 AD. This book provides detailed information on the timing, duration and location of all eclipses mentioned.

This item was about total solar eclipse of 18th August 1868. At Masulipatnam Pogson detected the hydrogen line emission, with a spectroscope. He saw a bright yellow line near the position of D lines of Sodium. The line originated from hitherto unknown element later termed as helium after the source of earliest detection. Hand coloured sketch of the solar spectrum during the Total Solar Eclipse of 1868. Hand coloured picture of the sun before and after the total solar eclipse 1868.

This letter was about to furnishing the eclipse photographs as requested by Govt. of India.

This is a Letter from R. K. Rangachan to R. L. Jones regarding the lunar eclipse. It is a query asking if there was a lunar eclipse visible in India on May 7, 1715. It also says that A.D.Maestro Servel and Dikshit stated in their Hindu calendar that there was a total eclipse of the sun on April 22 previously.

The item contains three pieces of information preserved in a single laminated sheet. The first document is a handwritten address slip of sending some objects from Madras Observatory to the collector of north Arcot Chittoor. The second document is an observation note on the moon eclipse on 22 January 1888. The third one is also notes of observation taken in 1960, 1964, 1969, 1972, and 1975 but the other details need to be recognized.

This item was about the sketch of the path of a total solar eclipse that occurred in India in 1868. It depicts the Peninsula of India and shows the track of the Moon's shadow during the eclipse on August 17, 1868. The sketch was created by V.T. & A.K. Johnston in Edinburgh and includes scalar measurements at the bottom.

These photographic slides contain photos of the Mexico Eclipse camp in 1970, the solar corona in 1980, and the Spectrograph well.

These photographic slides contain photos of Solar eclipse, Solar corona and J.C Bhattacharya.

These photographic slides contain astronomical events, some observations like the Evershed effect, the Spectrum by Evershed, Partial phase of moon eclipse, etc.

These photographic slides contain some places where the solar eclipse was seen, the eclipse tower, the spectrograph, and a few photographs of J.C. Bhattacharya.